Bluebird - Motion Activated Tweeting Bird by Nature's Garden. Whistle up a smile. This cheerful bluebird perched on a mound of sculpted spring flowers is a visual and acoustic delight. Crafted from lightweight and durable high-fired porcelain, this motion activated accessory features hand glazing that gives each piece distinctive appeal and emits a musical tweet whenever you walk by or wave. The porcelain bluebird measures 3 æ Inch by 2 æ Inch and stands 4 Ω Inch high from base to top. Each of the collectible figurines in our Motion Activated collection, designed by our team of skilled artisans, comes with long-lasting batteries.